DASH
Digital Cash is one of the pioneers of the Proof of Stake algorithm and built on the core Bitcoin platform or system, but with additional privacy and quick transaction features such as PrivateSend and InstantSend.
LISK
Lisk uses a customized PoS known as delegated Proof-of-Stake, or DPoS. It means only the top 101 delegates are able to stake coins on this network. The delegates are voted on a rolling basis by the community.
DIVI
Divi -- is the inventor of a novel 5-tiered masternode system, with the first level requiring investment of 1,000 DIVI. This means a masternode holder needs an investment of only $2,490 since the current price is $2.49 as at the time of this writing.
NEO
NEO uses a delegated Byzantine Fault Tolerance (dBFT), which is basically an optimized Proof-of-Stake system. The system maintains consensus even when some nodes bare malicious intentions. You require about 1,000 NEO in the minimum to stake, which is an investment of about $87,000 at the current price of $87 as at the time of this writing.
NAV Coin
NAV Coin, which was formed in 2014, uses dual blockchain for private transactions and is based on the core Bitcoin code. A transaction takes only 30 seconds to complete. You can opt for privacy with dual blockchains.
PIVX
PIVX means Private Instant Verified Transaction and was forked out of DASH in 2016 to offer more privacy and security in transactions.
OKCash
OkCash started in in 2014 and facilitates fast microtransactions. It provides a return of 10 percent per year. The staking wallet is a desktop wallet and after moving the coins to the staking wallet, they mature and start earning after 8 hours.
Reddcoin
Reddcoin is a tipping blockchain platform for social networks. Users can tip anyone for content they like on the various social media platforms.
Stratis
Stratis is a blockchain-based platform that simplifies development, testing and deployment of C# applications on the dot NET framework. In comparison to its peers, the cryptocurrency offers returns of only 0.5-1% for staking using the StratisX Wallet.
Ethereum and PoS
Ethereum has been using Proof of Work from the word go and being one of the popular cryptocurrencies, it is one of the early cryptocurrency projects that have been considering PoS.
We also have Nxt, Omni, BitcoinDark, BitShares, Blocknet, CLAMS, Cloakcoin, Crowns, Diamond, Elastic, Factom and GridCoin.